无码高清视频|成人自拍视频|欧美成人午夜无码A片秀色直播|草美女视频网站|美女被操网站在线观看

<pre id="fakw2"><strong id="fakw2"></strong></pre>

<ruby id="fakw2"><xmp id="fakw2"></xmp></ruby>

單項選擇題

The essential part of the diesel engine, whose function is to convert the heat energy into the mechanical power, is the （）.

A.crankshaft
B.piston
C.connecting rod
D.bearing

你可能感興趣的試題

單項選擇題

Among the main propulsion units on board the ship with the same capacity, the lightest one is（）.

A.steam engine
B.steam turbine
C.gas turbine
D.diesel engine

單項選擇題

The rotating range of the low speed diesel engine is usually lower than （）.

A.100 rpm
B.200 rpm
C.300 rpm
D.500 rpm

<ruby id="pemw2"><small id="pemw2"></small></ruby>